Known as "Jenny Hannivers", there was a roaring trade in these in the 19th century. One is even featured in the season 2 X-Files story 'Humbug', set around suspicious deaths at a town, that is populated by carnival and circus folk. It features 'The Enigma', a geek in the carny sense of the word (he will eat anything) from the great Jim Rose Circus. Jim also appears, doing his 'blockhead' act.😁😘😘😘